Lukas Biewald
About
Lukas Biewald is from San Francisco, California, United States. Lukas is currently SVP of AI at CoreWeave. Lukas also works as Angel Investor at L2K, a job Lukas has held since Jan 2021. In Lukas's previous role as a Founder, CEO at Weights & Biases, Lukas worked in until Oct 2025. Prior to joining Weights & Biases, Lukas was a Founder, CEO at Figure Eight and held the position of Founder, CEO. Prior to that, Lukas was a Senior Scientist at Powerset, Inc from Jan 2007 to Dec 2007. Lukas started working as Relevance Engineer, Engineering Manager at Yahoo, Inc in Jan 2005. From Sep 2004 to Jan 2005, Lukas was Research Assistant at Stanford University AI Lab. Prior to that, Lukas was a Engineer at Enablearning, Inc. from Jun 1999 to Sep 2002.
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Lukas Biewald's current jobs
Building tools for AI developers
Investments in Runway.ai, Lambda Labs, Modal Labs, Exa, Flapping Airplanes, Ndea, Edison Scientific, Cartesia, Clickhouse, Substack, Juicebox, Llama Index, Axiom Bio, Parsed, Replicate, Rill Data, Softmax, Sophist, Twelve Labs, Chartable, Marimo, Additive, Gimlet, Recursive, Flapping Airplanes
Lukas Biewald's past jobs
Building tools for ML practitioners. Sold to CoreWeave (CRWV)
ML training data labeling company formerly known as CrowdFlower. Sold to Appen (ASX:APX).
Built search engine relevance testing framework and methodology. Led team in charge of the search engine ranking, selection and summarization algorithm.
Build and deployed ML to improve the web search ranking function for international markets, including Japan, Germany, UK, Korea, France, and emerging markets.
NLP research with Daphne Koller.
Built interactive front end for education software company. Designed and built a statistical system from tracking student understanding and evaluation.